library(tibble)
options(digits = 2)
df <- tibble(
  label = LETTERS[1:22],
  mean = rnorm(22,mean = 1, sd=0.2),
  lower = mean - 0.1,
  upper = mean + 0.2,
  group = c(rep("Group-1",7),rep("Group-2",7),rep("Group-3",8))
)
df

